Time Zone

I bought a Smartro Projection Alarm Clock with Thermometer SM3531B in 2018 CE after comparing several clocks. This one is best for American self-metrication in my opinion for several reasons.

Advantages:

Day Month Option
(You can choose between Month / Date and Date / Month)
Most people on Earth use DMY as you can see below:

Even American passports use DMY Date Format for optimal international compatibility:

Celsius Option

Indoor and Outdoor Temperature

Time and Temperature Projection on ceiling or wall for convenient night viewing

Automatic Correction to Exact Time via WWVB, a time signal radio station near Fort Collins, Colorado operated by the National Institute of Standards and Technology (NIST)

Automatic Adjustment for Daylight Saving Time (DST)
(Turn DST function off if you live in Arizona)

Disadvantage:

Full function of Smartro Projection Clock SM3531B is limited to four American time zones:
EST: Eastern Standard Time (-5)
CST Central Standard Time (-6)
MST: Mountain Standard Time (-7)
PST: Pacific Standard Time (-8)